Packaged Article Weak Seal Design for Stable Discharge
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Solution Overview
Problem
Existing packaged articles with hermetically sealed container compartments experience unstable discharge directions when pressed open, leading to undesirable content dispersion.
Innovation Solution
A packaged article design featuring a container compartment with a primary section and a secondary section having a narrow neck, where the secondary section is adjacent to the weak sealant section, limiting boundary portion bending and stabilizing the discharge direction by maintaining a strong sealant state during weak sealant section parting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only a weak sealant section is used in the welded portion, then the sealing can be easily opened by pressing, but the discharge direction becomes unstable due to bending at the boundary portion
Solution Approach 1:
The welded portion is segmented into two distinct sections: a weak sealant section for easy opening and a strong sealant section for maintaining structural stability. This segmentation allows each section to perform its specific function independently, resolving the contradiction between ease of opening and discharge direction stability.
Solution Approach 2:
Different sealant strengths are applied to different locations within the welded portion. The weak sealant section is positioned where opening is needed, while the strong sealant section is positioned to maintain the discharge direction. This local differentiation of properties allows simultaneous achievement of easy opening and stable discharge.
2Reliability
If a strong sealant section is added to maintain welded state, then the discharge direction stability improves, but the opening force required increases
Solution Approach 1:
The welded portion is divided into weak and strong sealant sections, allowing the weak section to be opened with minimal force while the strong section maintains overall structural integrity and discharge direction stability.
Solution Approach 2:
The sealant strength parameter is varied across different sections of the welded portion. By creating a gradient or zoned distribution of sealant strength (weak in the opening region, strong in the structural region), the patent achieves both easy opening and stable discharge direction without requiring excessive opening force.
3Productivity
If the container compartment is pressed to open, then the content can be discharged, but the boundary portion bends causing unstable discharge direction
Solution Approach 1:
The strong sealant section is strategically positioned to reinforce the boundary portion at critical locations. This localized reinforcement prevents bending at the boundary while allowing the weak sealant section to open smoothly, maintaining both discharge efficiency and shape stability.
Solution Approach 2:
The strong sealant section is pre-positioned in the welded portion to provide structural support before opening occurs. This preliminary structural preparation ensures that when pressing happens, the boundary portion maintains its shape and the discharge direction remains stable.
Data Source
Figure 1A~1D
Figure 2A~2D
Figure 3A~3D
AI summary
A packaged article (11) is provided with: a packaging bag (12) including a weld section (31) for sealing a containing section (21); and fluid contents (C) contained in the containing section (21). The weld section (31) has a weak seal section (32) and a strong seal section (33). The weak seal section (32) is configured so that, when the containing section (21) is pressed, the weak seal section (32) is separated to connect the containing section (21) and the outside of the packaging bag (12). The strong seal section (33) is configured so as to be maintained in the welded state when the weak seal section (32) is separated. The containing section (21) is provided with a primary containing section (22) and a secondary containing section (23). The secondary containing section (23) includes a narrow section formed so as to be narrower than the primary containing section (22) in the width direction Y which is the direction in which the weak seal section (32) extends. The secondary containing section (23) is in communication with the primary containing section (22) at the narrow section. The secondary containing section (23) is adjacent to the weak seal section (32).